Process and means for securing metallic coats on ceramic surfaces.



'LEo HELLER, or rnrmrz, AUSTRIA-HUNGARY.

PROCESS AND MEANS FOR SECURING-METALLIC COATS ON CERAMIC SURFACES.

1,126,211. No Drawing.

To all whom it may concern Be it known that I, LEO HELLER, a citizen ofthe Austro-Hun arian Em ire, and residing at Teplitz, ohemia'ustria-Hungary, have invented a certain new and use ful Improved Processand Means for Securing Metallic Coats on Ceramic Surfaces, of which thefollowing is, a specification.

This invention relates to the application of metal to ceramic bodies,and its object is to provide an improved process and means forcausingmetallic coats .to adhere firmly on the surfaces of ceramicobjects,-such as those of porcelain, glass, terracotta, stoneware andthe like.

My improved means consists of a mixture of approximately 5' partslinseed oil, 5 parts turpentine oil, 250 parts bone-black, 180

partsrosin and-420 parts chemically puri-v fied finely divided graphite.These ingredients are. intimately mixed in a color-mill until thecomposition is adapted to be applied like a paint by a brush or the likeon the ceramic surface.

My improved process of providing ceramic bodies with a firmly adheringmetallic coat is carried into practice as follows :A coating of thedescribed composition applied to the surface of the ceramic body isallowed to dry in the air, whereupon the coated objectis heated to aboutC. in an enameling stove'.- On cooling, the object thus coated is highlypolished, preferably by means of a rapi ly rotatingfiber brurh,whereupon a topics of this patent may be obtained for Specification ofLetters Patent' Application flied March 24, 1914. Serial No. 826,951.

coat of metal is electrolytically deposited on it.

The intermediate layer of the described composition not only constitutesa specially good connectionbetween the ceramic sur face and the metalliccoat, but it possesses very great conductivity and is adapted for havingcopper and nickel coats applied to it.

I claim 2+ 1. Means for causing metallic coats to oil, 5 partsturpentine oil, 250 parts boneblack, parts rosin and 420 parts finelydivided washed graphite, in allowing the coating to dry in the air, inthen heating the coated body to about 80 (1., in allowing the same tocool, in highly polishing the same, and in electrolytically depositingcoat of metal thereon.

In testimony whereof, I aflix my signature in the presence of twowitnesses.

LEO HELLER.

Witnesses RUDOLPH FRICKE, Dome 'KRAHL.

five cents each, by addressing the Commissioner of .ratents,

'aahington, D. 6.

